PDF malware analysis — malicious · 7d84755b44744dcc

MALICIOUS

PDF

7.4 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: 742d5371da5549f577bf1ea31b8cd118 SHA-1: f0bf092b54cde630383ff84f8518f0b227e89984 SHA-256: 7d84755b44744dcc886e9d6a08a95a0b4c0ff4a335ff0c796cb90778ce3859a9

410 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript that exploits multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) in Adobe Reader. The JavaScript is heavily obfuscated but ultimately attempts to download and execute a second-stage payload from the URLs http://state-nm.net/e/load.php?spl=pdf_new and http://state-nm.net/e/load.php?spl=pdf_pack. The presence of multiple exploit indicators and a high ML classifier score strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 11

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://state-nm.net/e/load.php?spl=pdf_new
- http://state-nm.net/e/load.php?spl=pdf_pack

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `6a8da25b6dde4adc77733463bfe4c2bb964e1fbe10fcd30cbd4d386d380c2d65`	pdf-javascript-stream	PDF /JS object 32 at offset 0x42D	136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `746c247f091b59023736534dd107c21a85740941dce3ea3e018241a97de4ca9f`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4EF	145 bytes
`javascript_obj0036_002.js` `65f75b6842bfb68e7139831ef0f2372d936d4d3d45cff3dc6dde3b8fe2de03a4`	pdf-javascript-stream	PDF /JS object 36 at offset 0x10D	168 bytes
`javascript_obj0038_003.js` `04505aff3a28e352491747b6c2866a18790288ae265bfc05bc292751806884b8`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC5E	186 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `9b0a7f037f46d2b588edf04c40136d94663422473afb0a390c7e2e93ada0335a`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	51 bytes
`legacy_pdfkit_stage_000.js` `53f899dff6d416a5cd0594553072bb62703c88b16ddee9caa27ecd7b8e291f71`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5EB	1634 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `63cf829517b78bf2eeaf1c1506ba402b0828f16560f97e116f0cc02e672fef50`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xDA1	1800 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `a70dc7b4cfffcd0c231c859b9c281913fb8d2cdebd3912d66ec0b72bb4708663`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x140B	2938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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